2128491080 has 64 divisors (see below), whose sum is σ = 4916376000. Its totient is φ = 829045504.

The previous prime is 2128491049. The next prime is 2128491091. The reversal of 2128491080 is 801948212.

It is a self number, because there is not a number n which added to its sum of digits gives 2128491080.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248306 + ... + 256734.

It is an arithmetic number, because the mean of its divisors is an integer number (76818375).

Almost surely, 2^2128491080 is an apocalyptic number.

2128491080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2128491080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2458188000).

2128491080 is an abundant number, since it is smaller than the sum of its proper divisors (2787884920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2128491080 is a wasteful number, since it uses less digits than its factorization.

2128491080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8606 (or 8602 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 2128491080 is about 46135.5728261826. The cubic root of 2128491080 is about 1286.3444532488.

The spelling of 2128491080 in words is "two billion, one hundred twenty-eight million, four hundred ninety-one thousand, eighty".